Day 10

How Much Sunshine?Investigation 3 part 1

Using a Bar Graph

Visualization Exercise 3.1

Lab Notebook, P. 7

9:59

11:02

12:12

13:26

14:23

14:4714:22

13:23

12:11

10:59

9:58

9:33

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Average daylight for two years

Average daylight for three years

December 21

Shortest Day

Why would someone say that?• Do we have fewer than

24 hours?– Fewer hours of

sunshine– Light + dark hours = 24

Longest Day?

• If it’s true that there is a shortest day, is there also a longest day of the year?– Yes, June 21

Today’s Sunlight

How many hours of sunlight will we have today?Example: Sunrise 6:24 a.m. Sunset 6:44 p.m.

Calculate the amount of sunlight.

Sunrise/Sunset Time for 2000

• Table is the sunrise and sunset times

• Times were recorded on the 21st each month

Hours of Daylight

• Calculate the hours and minutes of daylight on the 21st of each month.

• Make a bar graph to show the amount of daylight month by month

Hours of Daylight

• Copy the hours of

daylight• Make a bar graph to

show the amount of daylight month by month

• Remember that 60 minutes = 1 hour

Jan 9:59

Feb 11:02

Mar 12:12

Apr 13:26

May 14:23

Jun 14:47

Jul 14:22

Aug 13:23

Sept 12:11

Oct 10:59

Nov 9:58

Dec 9:33

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

The amount of daylight over a year in Berkeley?

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

Days get longer - Jan

to Jun

Days get shorter - Jun to

Dec

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

Longest Day? Shortest Day?

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

12 hours of daylight?

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

How many hours of sunlight on the longest day?

More than 14 hours

Review the Graph

0:00

2:24

4:48

7:12

9:36

12:00

14:24

16:48

Ho

urs

of

Day

lig

ht

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug Sep Oct

Nov

Dec

Month

How many hours of sunlight on the shortest day?

More than 9 hours

• What season is the longest day?

Sunlight & Seasons

• What season is the shortest day?

Global Daylight

• When one location on Earth has 14 hours of daylight, is all the rest of the world having 14 hours of daylight as well?

• Is the longest day of the year the same length?

• Is the longest day of the year the same day?

Global Daylight

• Are the longest days always in the summer?

• Are the shortest days always in the winter?

Reading• Turn to pg 12

• Read “Wendy and Her

Worldwide Weather

Watchers”• Answer the Think Questions

on page 16